Hey Pablo, Sorry to hear about your MBP. From what you are describing, my money would be on cable flex too. If you have not done any of your own repairs/teardowns of the laptop, I would still take it in to an Apple Store. The worst thing that could happen is they say they can't help you or they want to charge you for the fix. Best case scenario, they fix this for you. Doesn't hurt to try :) Let us know if you do go in for a visit and how it goes. Best of luck!

Hey Wayne, There are definitely dangers in using a heat gun but it has been the industry standard for softening adhesive for part removal for years. Those dangers primarily being heating parts of the device that you do not intend to heat. If the "pry tool" you are referring to is the iFixit iOpener, then I would highly recommend using that. It is a fantastic tool for only applying heat to the areas that you intend to do so on and it has been a joy for me to use on past repairs.